Modular hybrid dovetail rail clamping assembly

ABSTRACT

A modular dovetail rail clamping assembly includes a polymer body and a metal fixed clamp component. A threaded fastener extends through the body and into the fixed clamp component to draw the fixed clamp component into engagement with the body. The fixed clamp component and the body have mating longitudinal ridge and groove structures which rigidly fix alignment of the fixed clamp component relative to the body when assembled. A metal movable clamp component opposes the fixed clamp. A threaded clamping fastener extends through the movable clamp component and the body, and is received into the fixed clamp component to draw the movable clamp component into engagement with the body. A removable, reversible crossbar extends transversely across the body between the fixed clamp component and the movable clamp component.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. application Ser. No.15/273,835, filed Sep. 23, 2016.

BACKGROUND OF THE INVENTION (1) Field of the Invention

The instant invention relates to weapon accessories for commercial andcombat weapons, and more particularly to dovetail rail clampingassemblies for securing weapon accessories to a weapon.

(2) Description of Related Art

As the field of commercial and combat weaponry expands, numerous add-onaccessories have become available and are commonly mounted on variousfirearms. In order to mount these accessories, most weapons now include,or are modified to include, one or more dovetail attachment rails. Manyof the semi-automatic rifle systems include rail systems having fourseparate rails surrounding the barrel for maximum mounting surface area.Pistols often include a single dovetail rail extending forwardly fromthe trigger guard below the barrel. The accessories are typicallymounted to the dovetail rails using clamping assemblies which are partof a mount or which are incorporated directly into the accessoryhousing. Many varieties of clamping arrangements are known in the art.

There are two main types of dovetail attachment rails, the Weaver rail(or universal rail) and the newer MIL-STD 1913 rail, both of which havea virtually identical cross-sectional profile. The key difference liesin the placement of the recoil grooves and in the width of the grooves.MIL-STD-1913 grooves are 0.206″ wide and have a center-to-center widthof 0.394″. The placement of these grooves has to be consistent in orderfor it to be a true MIL-STD system. Weaver (universal) system groovesare 0.180″ wide and are not necessarily consistent in a center-to-centermeasurement from one groove to the next.

As is well known in this art, user configurable mounting arrangementsare highly desirable as there are many different types of accessoriesand many different preferences for their mounting and operation.Sighting accessories are typically mounted on an upper rail. However,electronic accessories, such as flashlights, IR illuminators and laserscan be mounted in many different locations around the barrel. Theability of the user to mount an accessory in a particular location on aweapon is paramount to ease of use, user effectiveness and mostimportantly, user safety. Customization is critical to every soldier andlaw enforcement officer.

SUMMARY OF THE INVENTION

The invention relates to dovetail rail mounting systems for removablysecuring weapon accessories to a dovetail rail. A modular dovetail railclamping assembly includes a body having a longitudinal axis and a railengaging surface extending parallel to the longitudinal axis. The bodymay be formed as a mount for receiving and securing a weapon accessoryto the dovetail rail, or the body may be integrated directly into thehousing of an accessory, such as a flashlight.

A fixed clamp component has a longitudinal rail groove and a threadedfastener extends transversely through the body and is received into thefixed clamp component to draw the fixed clamp component into firmengagement with the body. The fixed clamp component and the body havelongitudinal ridge and groove mating structures which rigidly fixalignment of the fixed clamp component relative to the body whenassembled. In the exemplary embodiments, the threaded fastener ispermanently fixed in place once the fixed clamp component is assembledwith the body.

A movable clamp component opposes the fixed clamp and also has alongitudinal rail groove. A threaded clamping fastener extendstransversely through the movable clamp component and the body and isremovably received into the fixed clamp component whereby the threadedclamping fastener draws the movable clamp component into engagement withthe body. The head of the clamping fastener is exposed on the outersurface of the movable clamp component so that the user may remove thefastener when mounting or unmounting the accessory.

A removable, reversible crossbar extends transversely across the railengaging surface between the fixed clamp component and the movable clampcomponent. In this regard, the body includes a crossbar spline channelextending transversely through the body and across the rail engagingsurface. The crossbar spline channel has a retaining ridge flush withthe rail engaging surface and an angled undercut beneath the retainingridge. The crossbar is formed so that it can be inserted into the splinein two different orientations. More specifically, the crossbar has agenerally rectangular cross-section with a universal rail bar on oneside thereof and a wider MIL-STD 1913 rail bar on an opposing sidethereof. A retaining groove which mates with the spline channelretaining ridge is formed on a side surface therebetween. The crossbarcan be reversibly mounted in the spline channel wherein the crossbar isslidably received in a first orientation within spline channel with theuniversal rail bar side slidably received in the spline channel and theMIL-STD 1913 rail bar side exposed above the rail engaging surface forengagement with the dovetail rail, and a second orientation with theMIL-STD 1913 rail bar side slidably received in the spline channel andthe universal rail bar side exposed above the rail engaging surface forengagement with the dovetail rail.

In another exemplary embodiment, the crossbar spline channel extendsonly partially inwardly from the fixed clamp component side of the bodywherein the crossbar is fully captured between the body and the fixedclamp component. This makes removal of the crossbar more difficult inembodiments where the fixed clamp component is not permanently secured.Moreover, this arrangement provides flexibility in manufacturing toeasily provide either of two different dedicated mounting options whenthe fixed clamp component is secured in place permanently.

In order to provide maximum flexibility in the manufacturing process,the body may be molded from a polymer material. This allows the body tobe molded as a custom mount shape, or directly integrated into thehousing of an accessory. In other exemplary embodiments, the crossbarmay also be formed from a polymer material. However, to also providemaximum strength and fixation on the dovetail rail, the fixed clampcomponent, the moveable clamp component and the crossbar are preferablyformed from a metal, such as aluminum. This hybrid material arrangementprovides the best features from both types of materials.

Accordingly, it can be seen that the present disclosure provides aunique and novel clamping assembly for any weapon accessory.

BRIEF DESCRIPTION OF THE DRAWINGS

While the specification concludes with claims particularly pointing outand distinctly claiming particular embodiments of the instant invention,various embodiments of the invention can be more readily understood andappreciated from the following descriptions of various embodiments ofthe invention when read in conjunction with the accompanying drawings inwhich:

FIG. 1 is a perspective view of a pistol mounted flashlightincorporating the hybrid modular dovetail rail clamping assembly of thepresent disclosure;

FIG. 2 is a perspective view of a dovetail rail;

FIG. 3 is an exploded perspective view of the hybrid modular dovetailrail clamp assembly;

FIG. 4 is another exploded view thereof from a different angle;

FIG. 5 is a cross-sectional view taken along line 5-5 of FIG. 1;

FIG. 6 is another cross-sectional view taken along line 6-6 of FIG. 1;

FIG. 7 is still another a cross-sectional view taken along line 7-7 ofFIG. 1;

FIG. 8 is a cross-sectional view of the crossbar spline channel;

FIG. 9 is a cross-sectional view thereof with the crossbar receivedtherein in a first orientation with the MIL-STD 1913 rail bar sideexposed for engagement;

FIG. 10 is another cross-sectional view thereof with the crossbarreceived therein in a second orientation with the universal rail barside exposed for engagement;

FIGS. 11-12 are exploded assembly views showing assembly of the crossbarin the first orientation with the universal rail bar side received intothe spline channel and the MIL-STD 1913 rail bar side exposed forengagement;

FIGS. 13-14 are exploded assembly views showing assembly of the crossbarin the second orientation with the MIL-STD 1913 rail bar side receivedinto the spline channel and the universal rail bar side exposed forengagement;

FIG. 15 is an exploded perspective view of another exemplary embodimentof the clamping assembly where the spline channel only partially extendsinto the body; and

FIG. 16 is a partially assembled view thereof showing the crossbarlocking in the channel.

DETAILED DESCRIPTION OF THE INVENTION

Referring now to the drawings, an exemplary embodiment of the inventionis generally indicated at 10 in FIGS. 1-14. The invention relates todovetail rail mounting systems for removably securing a weaponaccessory, such as a flashlight to a dovetail rail 12 (FIG. 2). Asdescribed above, there are two main types of dovetail attachment rails,the Weaver rail (or universal rail) and the newer MIL-STD 1913 rail,both of which have a virtually identical cross-sectional profile. Thekey difference lies in the placement of the recoil grooves 13 and in thewidth of the grooves 13. MIL-STD-1913 grooves 13 are 0.206″ wide andhave a center-to-center width of 0.394″. The placement of these grooves13 has to be consistent in order for it to be a true MIL-STD system.Weaver (universal) system grooves (not illustrated) are 0.180″ wide andare not necessarily consistent in a center-to-center measurement fromone groove to the next.

The modular dovetail rail clamping assembly 10 includes a body 14 havinga longitudinal axis A (FIG. 1) and a planar rail engaging surface 16extending parallel to the longitudinal axis A. The body 14 may beintegrated directly into the housing of an accessory, such as aflashlight as illustrated. In the exemplary embodiment, the body 14 ismolded as part of the elongated housing of a flashlight having a light18 at the head end thereof and switches 20 at the tail end. Thelongitudinal axis A extends between the head 18 and the tail 20 of theflashlight housing (body) 14.

Alternately, the body 14 may be formed as a separate mount body forreceiving and securing a weapon accessory to the dovetail rail 12. Whenformed as a mount body, the body may include an opposing mount surfacecontoured to receive the housing of a weapon accessory, which maycomprise any of a variety of lights, laser, IR illuminators, sightingdevices or magnifiers.

Turning to FIGS. 3 and 4, a fixed clamp component 22 has a longitudinalrail groove 24 for engaging the dovetail rail 12. A first threadedfastener 26 extends transversely through the body 14 and is receivedinto a threaded opening 28 in the fixed clamp component 22 to draw thefixed clamp component 22 into firm engagement with the body 14.Referring briefly to FIG. 5, it can be seen that the fixed clampcomponent 22 and the body 14 have longitudinal ridge 30 and groove 32mating structures which rigidly fix alignment of the fixed clampcomponent 22 relative to the body 14 when assembled. Moving to FIG. 7,the head of the threaded fastener 26 is recessed into the body 14, andin the exemplary embodiments, the threaded fastener 26 is permanentlyfixed in place with an epoxy plug 34, once the fixed clamp component 22is assembled with the body.

Turning back to FIGS. 3 and 4, a movable clamp component 36 opposes thefixed clamp component 22 and also has a longitudinal rail groove 38 forengaging the opposing side of the dovetail rail 12. A threaded clampingfastener 40 extends transversely through the movable clamp component 36and the body 14 and is removably received into a second threaded opening42 in the fixed clamp component 22 whereby the threaded clampingfastener 40 draws the movable clamp component into engagement with thebody (See FIG. 6). The head of the clamping fastener 40 is exposed onthe outer surface of the movable clamp component 36 so that the user mayremove the fastener 40 when mounting or unmounting the assembly. A snapring washer 44 is received in a groove 46 in the shank of the fastener40 to retain the movable clamp component 36 and the fastener 40 togetheras a unit.

A removable, reversible crossbar 48 extends transversely across the railengaging surface 16 between the fixed clamp component 22 and the movableclamp component 36. In this regard, the body 14 includes a crossbarspline channel 50 extending transversely through the body 14 and acrossthe rail engaging surface 16. Referring to FIGS. 8-10, the crossbarspline channel 50 has a retaining ridge 52 flush with the rail engagingsurface 16 and an angled undercut 54 beneath the retaining ridge 52. Thecrossbar 48 is formed so that it can be inserted into the spline channel50 in two different orientations (FIGS. 9 and 10). More specifically,the crossbar 48 has a generally rectangular cross-section with auniversal rail bar 56 on one side thereof and a wider MIL-STD 1913 railbar 58 on an opposing side thereof. A retaining groove 60 which mateswith the spline channel retaining ridge 52 is formed on a side surfacetherebetween.

Turning to FIGS. 11-14, the crossbar 48 can be reversibly mounted in thespline channel 50 wherein the crossbar 48 is slidably received in afirst orientation (FIGS. 11-12) within spline channel 50 with theuniversal rail bar side 56 slidably received in spline channel 50 andthe MIL-STD 1913 rail bar side 58 exposed above the rail engagingsurface 16 for engagement with the dovetail rail 12 (See also FIG. 9),and a second orientation (FIGS. 13-14) with the MIL-STD 1913 rail barside 58 slidably received in the spline channel 50 and the universalrail bar side 56 exposed above the rail engaging surface 16 forengagement with the dovetail rail 12 (See also FIG. 10).

Referring to FIGS. 15 and 16, another exemplary embodiment isillustrated and generally indicated at 100. In this embodiment, thecrossbar spline channel 50A extends only partially inwardly from thefixed clamp component 22 side of the body 14A. The crossbar 48A is madeslightly shorter in length and is fully captured between the body 14Aand the fixed clamp component 22, rather than the two clampingcomponents 22 and 36. This arrangement provides flexibility inmanufacturing to easily provide either of two different dedicatedmounting options when the fixed clamp component 22 is secured in placepermanently.

In order to provide maximum flexibility in the manufacturing process,the body 14, 14A may be molded from a polymer material. This allows thebody 14, 14A to be molded as a custom mount shape, or directlyintegrated into the housing of an accessory as described above. In otherexemplary embodiments, the crossbar 48, 48A may also be formed from apolymer material. However, to also provide maximum strength and fixationon the dovetail rail 12, the fixed clamp component 22, the moveableclamp component 36, the crossbar 48, 48A and the threaded fasteners 26,40 are preferably formed from a metal, such as aluminum. This hybridmaterial arrangement provides the best features from both types ofmaterials.

It can therefore be seen that the exemplary embodiments provide a uniqueand novel modular hybrid material clamping assembly for any weaponaccessory.

While there is shown and described herein certain specific structuresembodying various embodiments of the invention, it will be manifest tothose skilled in the art that various modifications and rearrangementsof the parts may be made without departing from the spirit and scope ofthe underlying inventive concept and that the same is not limited to theparticular forms herein shown and described except insofar as indicatedby the scope of the appended claims.

What is claimed is:
 1. A modular dovetail rail clamping assemblycomprising: a body; a fixed clamp component having a longitudinal railgroove, said fixed clamp component being removably engaged with saidbody, a movable clamp component having a longitudinal rail groove; athreaded clamping fastener extending through said movable clampcomponent and said body and removably received into said fixed clampcomponent; and a crossbar extending transversely across said body in aspline channel formed in said body between said fixed clamp componentand said movable clamp component, said crossbar having a universal sizerail bar on one side and a MIL-STD 1913 size rail bar on another side,said crossbar being removable and reversible within said spline channel.2. The clamping assembly of claim 1 wherein said first threaded fasteneris permanently received into said fixed clamp component.
 3. The clampingassembly of claim 1 wherein said body is molded from a polymer, and saidfixed clamp component, said moveable clamp component and said crossbarare metal.
 4. The clamping assembly of claim 1 wherein said crossbarspline has a retaining ridge and an undercut beneath said retainingridge, said crossbar having a generally rectangular cross-section withsaid universal rail bar on one side thereof and said MIL-STD 1913 railbar on an opposing side thereof, and a retaining groove on a sidesurface therebetween, said crossbar being reversible wherein saidcrossbar is slidably received in a first orientation within saidcrossbar spline channel with said universal rail bar side slidablyreceived in said spline channel and said MIL-STD 1913 rail bar sideexposed for engagement with said dovetail rail, and a second orientationwith said MIL-STD 1913 rail bar side slidably received in said splinechannel and said universal rail bar side exposed for engagement withsaid dovetail rail.
 5. The clamping assembly of claim 1 wherein saidcrossbar spline channel extends only partially inwardly from said fixedclamp component side of said body such that said crossbar is capturedbetween said body and said fixed clamp component.
 6. The clampingassembly of claim 5 wherein said first threaded fastener is permanentlyreceived into said fixed clamp component, and said crossbar ispermanently captured in said spline channel.
 7. The clamping assembly ofclaim 1 wherein said body comprises a mount body which is removablysecured to a weapon accessory.
 8. The clamping assembly of claim 1wherein said body comprises an accessory body.
 9. The clamping assemblyof claim 8, wherein said accessory body is a flashlight body.
 10. Amodular dovetail rail clamping assembly comprising: a body; a fixedclamp component removably engaged with said body; a movable clampcomponent; a clamping fastener extending through said movable clampcomponent and said body and removably received into said fixed clampcomponent; and a crossbar extending across said body in a spline channelformed in said body between said fixed clamp component and said movableclamp component, said crossbar being removable and reversible withinsaid spline channel.
 11. The clamping assembly of claim 10 wherein saidcrossbar has a universal size rail bar on one side and a MIL-STD 1913size rail bar on another side.
 12. The clamping assembly of claim 10wherein said body is molded from a polymer, and said fixed clampcomponent, said moveable clamp component and said crossbar are metal.13. The clamping assembly of claim 10 wherein said crossbar spline has aretaining ridge and an undercut beneath said retaining ridge, saidcrossbar having a generally rectangular cross-section with saiduniversal rail bar on one side thereof and said MIL-STD 1913 rail bar onan opposing side thereof, and a retaining groove on a side surfacetherebetween, said crossbar being reversible wherein said crossbar isslidably received in a first orientation within said crossbar splinechannel with said universal rail bar side slidably received in saidspline channel and said MIL-STD 1913 rail bar side exposed forengagement with said dovetail rail, and a second orientation with saidMIL-STD 1913 rail bar side slidably received in said spline channel andsaid universal rail bar side exposed for engagement with said dovetailrail.
 14. The clamping assembly of claim 10 wherein said crossbar splinechannel extends only partially inwardly from said fixed clamp componentside of said body such that said crossbar is captured between said bodyand said fixed clamp component.
 15. The clamping assembly of claim 14wherein said clamping fastener is permanently received into said fixedclamp component, and said crossbar is permanently captured in saidspline channel.
 16. The clamping assembly of claim 10 wherein said bodycomprises a mount body which is removably secured to a weapon accessory.17. The clamping assembly of claim 10 wherein said body comprises anaccessory body.
 18. The clamping assembly of claim 17, wherein saidaccessory body is a flashlight body.